svn commit: r315667 - in stable/11/sys: dev/xen/control dev/xen/xenstore xen/xenstore

[Roger Pau Monné]

Author: royger
Date: Tue Mar 21 08:36:25 2017
New Revision: 315667
URL: https://svnweb.freebsd.org/changeset/base/315667

Log:
  MFC r314841:
  
  xenstore: fix suspension when using the xenstore device
  
  Submitted by:         Liuyingdong <liuyingdong at huawei.com>
  Reviewed by:          royger

Modified:
  stable/11/sys/dev/xen/control/control.c
  stable/11/sys/dev/xen/xenstore/xenstore.c
  stable/11/sys/xen/xenstore/xenstorevar.h
Directory Properties:
  stable/11/   (props changed)

Modified: stable/11/sys/dev/xen/control/control.c
==============================================================================
--- stable/11/sys/dev/xen/control/control.c	Tue Mar 21 08:34:41 2017	(r315666)
+++ stable/11/sys/dev/xen/control/control.c	Tue Mar 21 08:36:25 2017	(r315667)
@@ -199,7 +199,9 @@ xctrl_suspend()
 	int suspend_cancelled;
 
 	EVENTHANDLER_INVOKE(power_suspend_early);
+	xs_lock();
 	stop_all_proc();
+	xs_unlock();
 	EVENTHANDLER_INVOKE(power_suspend);
 
 #ifdef EARLY_AP_STARTUP

Modified: stable/11/sys/dev/xen/xenstore/xenstore.c
==============================================================================
--- stable/11/sys/dev/xen/xenstore/xenstore.c	Tue Mar 21 08:34:41 2017	(r315666)
+++ stable/11/sys/dev/xen/xenstore/xenstore.c	Tue Mar 21 08:36:25 2017	(r315667)
@@ -1699,3 +1699,20 @@ xs_unregister_watch(struct xs_watch *wat
 		sx_xunlock(&xs.xenwatch_mutex);
 	}
 }
+
+void
+xs_lock(void)
+{
+
+	sx_xlock(&xs.request_mutex);
+	return;
+}
+
+void
+xs_unlock(void)
+{
+
+	sx_xunlock(&xs.request_mutex);
+	return;
+}
+

Modified: stable/11/sys/xen/xenstore/xenstorevar.h
==============================================================================
--- stable/11/sys/xen/xenstore/xenstorevar.h	Tue Mar 21 08:34:41 2017	(r315666)
+++ stable/11/sys/xen/xenstore/xenstorevar.h	Tue Mar 21 08:36:25 2017	(r315667)
@@ -338,4 +338,15 @@ void xs_unregister_watch(struct xs_watch
  */
 struct sbuf *xs_join(const char *, const char *);
 
+/**
+ * Lock the xenstore request mutex.
+ */
+void xs_lock(void);
+
+/**
+ * Unlock the xenstore request mutex.
+ */
+void xs_unlock(void);
+
 #endif /* _XEN_XENSTORE_XENSTOREVAR_H */
+